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Environmental fate & pathways

Henry's Law constant

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Description of key information

From the water surface the substance will not evaporate into the atmosphere. 

Key value for chemical safety assessment

Additional information

The Henry's law constant of caffeine (0.00000363 Pa m³/mol) indicates that the substance is non-volatile from water surfaces. This conclusion is supported by a further study with an estimated Henry's law constant for caffeine of 1.93E-14 Pa m³/mol.